Semiconductor memory device
CA 2072046 C · Owner: Kogure, Kanari · Inventors: Kogure, Kanari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to this invention, a semiconductor memory device includes N M-port RAMs (where each of M and N is a positive integer of not less than two) a, data input terminal, N x (M-1) read address terminals a, write address terminal, and N x (M-1) data output terminals. The N M-port RAMs are operated in synchronization with a common clock signal. The data input terminal commonly inputs write data to data input terminals of the M-port RAMs. The N x (M-1) read address terminals independently input read addresses to first to (M-1)th port address terminals of the M-port RAMs. The write address terminal commonly inputs a write address to Mth port address terminals of the M-port RAMs. The N x …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 23, 1992 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.